Rotating field magnet for turbogenerators



Feb. 26, 1929. v 1,703,810

0. T. BLATHY ROTATING FIELD MAGNET FOR TURBOGENERATORS Original FiledJan. 14, 1927 A III/Ill Patented Feb. 26, 1929.

PTENT OFFICE.

o'r'ro TITUS BLATHY, or BUDAPEST, HUNGARY.

ROTATING FIELD MAGNET FOR TURBOGENERATORS.

Original application filed January 14, 1927, Serial No. 161,212, and inHungary May 26, 1926.

Divided and this application filed September 526, 1928. Serial No.307,286.

This application is a division of my aprdication Serial No. 161,212,filed Jan. 14:, 1927.

The intention relates to a rotatim; field magnet :li'or turhogeneratorsin which the field winding consists of more than two coils wound of baremetal strip and placed in slots of the iron magnet core, said slotsbeing closed by metal wet ges.

The invention relates more especially to an arrangement flCCOlTllIIiI towhich the field coils are connected in multiple at their inner ends andconveniently each h all of the numher of coils is connected to a commonline conductors so that. the outer onus of all the coils can he inelectroconductive contact with. the iron core of the field magnet.

According to the invention, the winding is suhdivided in each slot inradial direction, into two parts wound in opposite sense in such amanner, that the two parts of the winding are connected at their endssituated. in the middle of the slot to the line conductor, while the twoexternal turns situated at the bottom of the slot and the circumferenceof the rotor respectively, are in metallic contact with the iron core ofthe rotor.

In the drawing l i a ure 1.. shows a two-pole field magnet :mcordingr tothe in rention in cross section, and

liigurc 2 shows :1 circuit diagram of a rotating; licid magnetcomprising six field coils.

l igui-e 3 shows a slot containing the \Vinih i no according; to Figure2 in cross section.

Accordingrto Figure 1 the field winding consists of coils 1-6 which arewound of bare metal strips and are arranged in slots of the iron coreon, with insulating layers a separating the coils from the inner surfaceof the slot. The coils are maintained in the slots by means of metallicWedges Z) arranged so as to close the slots.

ll'iih reference to Figure 3. the winding; arranged in the slot, issubdivided in radial dircalicn nto wo parts (L and Y), which are wound winterposed insulation 0, in such a manner that the sense of winding; ofthe part 7) accnt to the bottom of the slot is opposite to the sense ofwindin of part a, facthe opening of the slot. The two parts a and of thecoil are connected in multiple at their m situated in the middle oi theclot and are c mooted to line conductors c and, 7 respectively, commonfor both parts a and 5).

Hence the external turns g and situated at the bottom 0 slot and at theopening it the hereot r:spectively can he in metallic, contact with theiron. core of the rotor. Owing this arrangement, the transfer of heat tothe iron core or". the TOLOI is further increased.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is:

In a rotating field magnet for turbogenerators, an iron core, twocollector rings connected therewith, a plurality of slots in said ironcore, coils wound oi? n'ictal strips of the breadth of the slots withinsaid slots metallic wedges closing the circum'fereniial openings oflililiti to secure said coils in said slots, part ":aid coils lasingconnected in multiple and to one collector rim at a central. turn of theslot, the reniaii'ni -f coils heing connected in multiple and to theother collector ring at'a central turn of the slot; and all coils beingby means of both oi? their outermost turns in metallic contact with saidiron core.

In testimony whereof I hereunto ailix my signature.

OTTO TITUS BLATHY.

